Always Networks Blog - ECMP

eBGP - ECMP in depth!

Sat 08 July 2017

My client recently did a fairly big change to the edge network in their data centre, including a migration to 4-byte AS numbers. This wasn't without it's challenges. So here is a (long) post about the challenges we faced, and some explanations of some of the more advanced features of BGP such as local-as no-prepend replace-as, and bestpath as-path multipath-relax.

Here is a very simplified …

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